<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        input[type=checkbox] {
            width: 100px;
            height: 100px;
            background: red;
        }

        input[type=radio] {
            width: 200px;
            height: 200px;
            background: green;
        }
    </style>
</head>
<body>
<!--
    E：checked      checkbox被选中后的状态
                    radio被选中后的状态

         E         checkbox或radio元素
-->
<input type="checkbox">
<input type="radio">
</body>
</html>